Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

A novel bipolar host material 9-(3-(5-(4-(diphenylphosphoryl)phenyl)-4- phenyl-4H-1,2,4-triazol-3-yl)phenyl)-9H-carbazole (CTPO) with carbazole, triazole and phosphine oxide moieties was designed and synthesized. CTPO was found to exhibit a high glass transition temperature (Tg = 127 °C), suitable HOMO and LUMO levels (5.65 and 2.42 eV), a high triplet energy (3.06 eV) and excellent bipolar properties. A device with 15 wt% doping concentration showed a low turn-on voltage of 2.5 V and maximum current and power efficiencies of 41.6 cd A-1 and 43.0 lm W-1, respectively. A high efficiency of 40.1 cd A-1 was achieved at the brightness of 100 cd m-2. Even at a high luminance of 1000 cd m -2, the efficiency remained as high as 35.2 cd A-1. © 2014 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

Original publication

DOI

10.1039/c3nj01054f

Type

Journal article

Journal

New Journal of Chemistry

Publication Date

01/02/2014

Volume

38

Pages

650 - 656